There have been some changes to the installation procedure. Calling ‘invoke’
on its own has been deprecated, you should use the ‘wger’ command (which
accepts the same options). Also some of these commands have been renamed:

start_wger to wger

bootstrap_wger to bootstrap

Upgrade steps from 1.7:

Django update to 1.9: pipinstall-rrequirements.txt

Database upgrade: pythonmanage.pymigrate

Reset cache: pythonmanage.pyclear-cache--clear-all

Due to changes in the JS package management, you have to delete
wger/core/static/bower_components and do a pythonmanage.pybowerinstall

Update static files (only production): pythonmanage.pycollectstatic

Load new the languages fixtures as well as their configuration
pythonmanage.pyloaddatalanguages and
pythonmanage.pyloaddatalanguage_config

New config option in settings.py: WGER_SETTINGS['TWITTER']. Set this if
your instance has its own twitter account.